Claude Parallel Tool Calls: How to Trigger Them

Anthropic's documentation notes that the latest Claude models natively execute independent tool calls—such as reading multiple files or performing speculative searches—in parallel. Prompt the model to batch independent read operations into a single turn.

When investigating a bug across the codebase, identify all independent files and speculative searches needed upfront, and execute those read_file and search tool calls in parallel within a single turn rather than sequentially.